Mail Parameters 2009-03-24 Specification Required Unassigned specifies an initial list of keywords for the experimental encoding header field (EHF-MAIL), and provides that additional keywords may be registered with the IANA. EDIFACT EDIFACT format EDI-X12 EDI X12 format ANSI-X12 EVFU FORTRAN format FS File System format Hex Hex binary format LZJU90 LZJU90 format LZW LZW format Message Encapsulated Message PEM, PEM-Clear Privacy Enhanced Mail PGP Pretty Good Privacy Postscript Postscript format Adobe Systems Inc., "PostScript Langpuage Reference Manual", 2nd Edition, 2nd Printing, January 1991. Shar Shell Archive format Signature Signature Tar Tar format Text Text uuencode uuencode format URL external URL-reference